121 
Annals oe the Transvaal Museum. 
IMympk. — Body (unengorged) elongate, elliptical ; reddish brown in 
colour ; length 1.5 mm. by 1 mm. wide. Shield covers anterior half of body. 
When engorged, body oval, widely rounded, slightly wider in front than 
behind ; length 4.5 mm. by 3 mm. wide ; colour bright bluish, lighter on 
margins. Shield pentagonal ( XI a) ; longer than wide, well rounded 
behind ; deep brown in colour ; lateral angles very posterior ; cervical 
grooves nearly straight, deep, reaching almost to the posterior margin ; 
eyes hemispherical, dark coloured. Dorsal surface with numerous unequal, 
deep and irregularly distributed pits, each with a minute whitish hair ; 
two anterior grooves very divergent and slightly concave outward, some- 
times these grooves are doubled by a second groove which is not continuous 
throughout its extent ; three posterior grooves one median and faintly 
marked, laterals shorter and slightly divergent posteriorly. Ventral 
surface sometimes with whitish hairs ; punctured as on dorsal surface ; 
ano-marginal groove distinct and reaching to the posterior margin ; 
genital grooves widely divergent behind coxae IY ; stigmatic plates 
whitish, nearly circular ; anus near posterior third of length. Rostrum 
(XI, a) short ; base much wider than long ; posterior edge straight ; sides 
rounded ; hypostome with four rows of teeth mandibles with inner 
apophysis bearing a tridentate process, outer apophysis with three teeth, 
the upper of which is very small ; palpi elongate, cylindrical, article I 
very short, article II at least twice as long as broad, article III only 
slightly longer than broad. Legs slender ; reddish brown in colour ; 
coxae each bear two blunt, almost inconspicuous teeth on their posterior 
margins, those of coxae I are longer and • sharper than those on the 
remaining coxae ; tarsi elongate, no spurs. 
Larva. — Body, when unengorged, elongate, elliptical, widest near 
middle ; well rounded behind ; length 0.5 mm., width about 0.3 mm. ;■ 
colour light yellowish ; shield darker coloured and covering anterior half 
of body. When engorged, body is elongate, elliptical, sides nearly parallel ; 
length 1.2 mm. by 0.6 mm. wide ; colour deep brownish blue. Shield 
as wide as long ; widely rounded behind ; colour light reddish brown ; 
shagreened ; cervical grooves deep anteriorly then shallow, extending two- 
thirds of the length of the shield ; eyes small, hemispherical, dark 
coloured. Dorsal surface (XI, e) with three longitudinal grooves. Ventral 
surface (XI, e), with anus near posterior third ; eleven festoons, distinctly 
marked ; stigmatic openings in four pairs, one behind each coxa, and a 
fourth pair in the posterior portion of the body, not far from the margin. 
Rostrum short ; base wider than long ; posterior margin concave ; sides 
rounded ; palpi short and thick, article I very short, article II twice as 
long as wide, article III as wide as long ; hypostome with four rows of 
teeth ; mandibles with process of inner apophysis tridentate ; outer 
apophysis tridentate, upper tooth very small and sub-terminal. Legs 
slender ; coxae with no teeth ; tarsi elongate. 
Hggs . — Dark brown in colour ; surface shiny ; elliptical in outline ; 
length 0.5 mm. by 0.3 mm. in width. 
Hosts. — The different domestic animals, ox, horse, ass, mule, sheep, 
dog, giraffe, eland, reed buck. 
Habitat. — South Africa : Cape Colony, Transvaal, Fatal, "Rhodesia, 
German East Africa, tropical Africa, German South-West Africa, 
Mocambique. 
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